Karel_1 
Master Traveler
Large map download error solution:
Maps like Europe may stop downloading halfway.
What worked for me is to log in to My Drive and connect Go premium to laptop. In My Drive connect use the tab My content.
Tick the map (My updates and new items) and 'repair' for the corrupted map (My maps). Use dropdown arrow and save to SD card.
Then on Go Premium 'add map' to start repair process.
